A second later, something happened that changed us in a deep and profound way from that day
forward

Phew. It's done, for very small values of done. Naturally, we didn't have time to implement all of the ideas we'd planned, and there are still lots of bugs left. It would've been nice to shake out the major visibility and pathfinding bugs and whip up a few more levels, but we just ran out of time.
Anyway, it was fun. Thanks to everyone who assisted in making this happen!